Now that the Supreme Court has ruled ObamaCare’s individual mandate constitutional, the direction of American health policy is in the hands of voters. So how do we get from here to “repeal and replace”?

Step one is electing Mitt Romney as president, along with Republican House and Senate majorities. Without a Republican sweep, the law will remain in place.

But a President Romney does not need 60 Republican senators to repeal core elements of ObamaCare. Democrats lost their 60th senate vote in early 2010 after Scott Brown took Edward Kennedy’s seat. To bypass a Senate GOP filibuster and enact portions of ObamaCare, they used a special legislative procedure called reconciliation.

Reconciliation allows a bill to pass the Senate in a limited time period, with limited amendments, and with only 51 votes; filibusters are not permitted. In 2010, Democrats split their health-policy changes into two bills, one of which they enacted through this fast-track process. In 2013, a Republican majority could use the same reconciliation process to repeal those changes.

The reconciliation process, however, applies only to legislative changes to taxes, spending and debt, or the change must be a “necessary term or condition” of another provision that affects taxes or spending.

Crucial parts of ObamaCare meet this test. Thus, if a President Romney has cohesive and coordinated majorities in the House and Senate, a reconciliation bill could repeal the Affordable Care Act’s Medicaid expansion, insurance premium and drug subsidies, tax increases (all 21 or them), Medicare and Medicaid spending cuts, its long-term care insurance program known as the Class Act, and its Independent Payment Advisory Board, a 15-member central committee with vast powers to control health-care and health markets.